package PublicInbox::LeiMailSync;
use strict;
use v5.10.1;
+use parent qw(PublicInbox::Lock);
use DBI;
use PublicInbox::ContentHash qw(git_sha);
use Carp ();
sqlite_use_immediate_transaction => 1,
});
# no sqlite_unicode, here, all strings are binary
- create_tables($dbh) if $rw;
+ create_tables($self, $dbh) if $rw;
$dbh->do('PRAGMA journal_mode = WAL') if $creat;
$dbh->do('PRAGMA case_sensitive_like = ON');
$dbh;
sub new {
my ($cls, $f) = @_;
- bless { filename => $f, fmap => {} }, $cls;
+ bless {
+ filename => $f,
+ fmap => {},
+ lock_path => "$f.flock",
+ }, $cls;
}
-sub lms_commit { delete($_[0]->{dbh})->commit }
+sub lms_write_prepare { ($_[0]->{dbh} //= dbh_new($_[0], 1)); $_[0] }
-sub lms_begin { ($_[0]->{dbh} //= dbh_new($_[0], 1))->begin_work };
+sub lms_pause {
+ my ($self) = @_;
+ $self->{fmap} = {};
+ delete $self->{dbh};
+}
sub create_tables {
- my ($dbh) = @_;
+ my ($self, $dbh) = @_;
+ my $lk = $self->lock_for_scope;
$dbh->do(<<'');
CREATE TABLE IF NOT EXISTS folders (
$fid;
}
+sub add_folders {
+ my ($self, @folders) = @_;
+ my $lk = $self->lock_for_scope;
+ for my $f (@folders) { $self->{fmap}->{$f} //= fid_for($self, $f, 1) }
+}
+
sub set_src {
- my ($self, $oidhex, $folder, $id) = @_;
+ my ($self, $oidbin, $folder, $id) = @_;
+ my $lk = $self->lock_for_scope;
my $fid = $self->{fmap}->{$folder} //= fid_for($self, $folder, 1);
my $sth;
if (ref($id)) { # scalar name
INSERT OR IGNORE INTO blob2num (oidbin, fid, uid) VALUES (?, ?, ?)
}
- $sth->execute(pack('H*', $oidhex), $fid, $id);
+ $sth->execute($oidbin, $fid, $id);
}
sub clear_src {
my ($self, $folder, $id) = @_;
+ my $lk = $self->lock_for_scope;
my $fid = $self->{fmap}->{$folder} //= fid_for($self, $folder, 1);
my $sth;
if (ref($id)) { # scalar name
# Maildir-only
sub mv_src {
my ($self, $folder, $oidbin, $id, $newbn) = @_;
+ my $lk = $self->lock_for_scope;
my $fid = $self->{fmap}->{$folder} //= fid_for($self, $folder, 1);
my $sth = $self->{dbh}->prepare_cached(<<'');
UPDATE blob2name SET name = ? WHERE fid = ? AND oidbin = ? AND name = ?
sub each_src {
my ($self, $folder, $cb, @args) = @_;
my $dbh = $self->{dbh} //= dbh_new($self);
- my ($fid, $sth);
+ my $fid;
if (ref($folder) eq 'HASH') {
$fid = $folder->{fid} // die "BUG: no `fid'";
} else {
$fid = $self->{fmap}->{$folder} //=
fid_for($self, $folder) // return;
}
- $sth = $dbh->prepare('SELECT oidbin,uid FROM blob2num WHERE fid = ?');
- $sth->execute($fid);
- while (my ($oidbin, $id) = $sth->fetchrow_array) {
- $cb->($oidbin, $id, @args);
+
+ # minimize implicit txn time to avoid blocking writers by
+ # batching SELECTs. This looks wonky but is necessary since
+ # $cb-> may access the DB on its own.
+ my $ary = $dbh->selectall_arrayref(<<'', undef, $fid);
+SELECT _rowid_,oidbin,uid FROM blob2num WHERE fid = ?
+ORDER BY _rowid_ ASC LIMIT 1000
+
+ my $min = @$ary ? $ary->[-1]->[0] : undef;
+ while (defined $min) {
+ for my $row (@$ary) { $cb->($row->[1], $row->[2], @args) }
+
+ $ary = $dbh->selectall_arrayref(<<'', undef, $fid, $min);
+SELECT _rowid_,oidbin,uid FROM blob2num WHERE fid = ? AND _rowid_ > ?
+ORDER BY _rowid_ ASC LIMIT 1000
+
+ $min = @$ary ? $ary->[-1]->[0] : undef;
}
- $sth = $dbh->prepare('SELECT oidbin,name FROM blob2name WHERE fid = ?');
- $sth->execute($fid);
- while (my ($oidbin, $id) = $sth->fetchrow_array) {
- $cb->($oidbin, \$id, @args);
+
+ $ary = $dbh->selectall_arrayref(<<'', undef, $fid);
+SELECT _rowid_,oidbin,name FROM blob2name WHERE fid = ?
+ORDER BY _rowid_ ASC LIMIT 1000
+
+ $min = @$ary ? $ary->[-1]->[0] : undef;
+ while (defined $min) {
+ for my $row (@$ary) { $cb->($row->[1], \($row->[2]), @args) }
+
+ $ary = $dbh->selectall_arrayref(<<'', undef, $fid, $min);
+SELECT _rowid_,oidbin,name FROM blob2name WHERE fid = ? AND _rowid_ > ?
+ORDER BY _rowid_ ASC LIMIT 1000
+
+ $min = @$ary ? $ary->[-1]->[0] : undef;
}
}
$err;
}
-sub forget_folder {
- my ($self, $folder) = @_;
- my $fid = delete($self->{fmap}->{$folder}) //
- fid_for($self, $folder) // return;
- for my $t (qw(blob2name blob2num folders)) {
- $self->{dbh}->do("DELETE FROM $t WHERE fid = ?", undef, $fid);
+sub forget_folders {
+ my ($self, @folders) = @_;
+ my $lk = $self->lock_for_scope;
+ for my $folder (@folders) {
+ my $fid = delete($self->{fmap}->{$folder}) //
+ fid_for($self, $folder) // next;
+ for my $t (qw(blob2name blob2num folders)) {
+ $self->{dbh}->do("DELETE FROM $t WHERE fid = ?",
+ undef, $fid);
+ }
}
}
# only used for changing canonicalization errors
sub rename_folder {
my ($self, $old, $new) = @_;
+ my $lk = $self->lock_for_scope;
my $ofid = delete($self->{fmap}->{$old}) //
fid_for($self, $old) // return;
eval {
$oidbin ? unpack('H*', $oidbin) : undef;
}
-# FIXED? something with "lei <up|q>" is causing uncommitted transaction
-# TODO: remove soon
-sub DESTROY {
- my ($self) = @_;
- my $dbh = delete($self->{dbh}) or return;
- return if $dbh->{ReadOnly};
- undef $dbh;
- warn "BUG $$ $0 $self {dbh} OPEN ppid=".getppid.' '.Carp::longmess();
-}
-
1;